A doll that screams!
Really really loudly!
Its witch has just told it a frustrating story about her work today!
She doesn't scream with it, but it's therapeutic to hear it scream for her sake.
It also cries and laughs when the situation arises - a strange sort of self-expression for a witch that was never too good at expressing herself.
And so she made a doll that could show how she feels out loud.
Unshackled by her ideas of form.